#!/usr/bin/env node

const { EventEmitter } = require('events');
const evt = new EventEmitter();

evt.on('hello',()=>
    console.log('hello event happen!')
);
evt.on('bye',()=>{
    console.log('good bye');
    process.exit();
});


setInterval(() => {
    evt.emit('hello');
},1000)

setTimeout(() =>{
    evt.emit('bye');
},5000)
